A219417 Unchanging value maps: number of n X n binary arrays indicating the locations of corresponding elements unequal to no horizontal or antidiagonal neighbor in a random 0..2 n X n array

1, 7, 93, 3617, 372560, 104434119, 80311501599, 170240798669115, 992546861505827096, 15854777538297903063593

Offset

1,2

Comments

Diagonal of A219421

Links

Table of n, a(n) for n=1..10.

Example

Some solutions for n=3
..1..1..0....0..0..0....1..1..0....0..0..1....0..0..0....0..0..1....0..0..0
..0..0..0....0..1..0....0..0..0....1..1..1....1..0..1....0..0..1....1..0..1
..1..0..1....0..0..1....0..1..1....1..0..0....1..1..1....1..0..0....0..0..0

Crossrefs

Sequence in context: A346464 A197484 A218835 * A220405 A109304 A134113

Adjacent sequences: A219414 A219415 A219416 * A219418 A219419 A219420

Keyword

nonn

Author

R. H. Hardin Nov 19 2012

Status

approved